Newegg offers the OEM Energy by Klipsch Powerbar One 2.1-Channel Soundbar with Built-in Subwoofer, model no. 1015526, for $79.99 plus $1.99 for shipping. That's the lowest total price we could find by $18 (outside of the mention below), although we saw it for $2 less three weeks ago. It features a 80Hz to 20kHz frequency response, 120 watts peak power, two 3" drivers, and two 3x5" front firing-fiber subwoofers.

Note: If you haven't yet, use Newegg's iPhone app and pay using Google Wallet to cut it further to $64.99. (This discount can only be used once per account.)